Single carrier pulse width modulator for 5-level converter with capacitor voltage self-balancing, equal loss distribution, and improved output voltage spectrum
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United States of America Patent
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Oct 15, 2024
Grant Date -
Jul 13, 2023
app pub date -
Jun 12, 2020
filing date -
Jun 12, 2020
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Abstract
The present disclosure provides a method and apparatus using a novel PWM switching technique that requires only one PWM carrier signal and benefits from two logic functions to provide switching signals and provides the flying capacitor (FC) voltage as well as dc-link capacitors voltages regulated to their desired values without external control. It may also, eliminate the odd multiples of the switching harmonic clusters from the output voltage is possible; double the frequency of first switching harmonic; reduce filtering efforts may be required since the values of the output LC filter inductor and capacitor can be very much reduced. Furthermore, notable reduction in control complexity is possible using the novel PWM method.
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